Dataset: SedimentTraps - 13C DIC
Deployment: 61TG_3052

Sediment Traps - 13C DIC

Principal Investigator:

Tom W. Trull (University of Tasmania, UTAS)

Co-Principal Investigator:

Dorothee C.E. Bakker (University of East Anglia, UEA)

Contact:

Doug Mackie (University of Otago)

BCO-DMO Data Manager:

Stephen R. Gegg (Woods Hole Oceanographic Institution, WHOI)

Project:

Southern Ocean Iron Release Experiment (SOIREE)

Current State:

Final no updates expected

Version:

20August2009

Deployment Synonyms:

SOIREE

Version Date:

2009-08-20

Data URL:

https://www.bco-dmo.org/dataset-deployment/451437/data

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Description

SOIREE Sediment Traps - 13C DIC

Methods & Sampling

Dataset acquisition description

See SOIREE Preliminary Voyage Report

Method notes:
1. All extractions done on 250ml with SOMMA automated acid addition device.
Evolved gas carried in N2 stream to cold trap, and then purified cryogenically from water
DIC yields measured manometrically, 13C-DIC run at 5V by dual-inlet Finnagin Delta-S
MS vs. working standard calibrated against NBS19 calcite.

2. Salinities from CTD - average of 2 meter bin about bottle depth - used for density
calculation for DIC concentrations.

3. Rau G.H., Riebesell U. and Wolf-Gladrow D., 1996, A model of photosynthetic 13C
fractionation by marine phytoplankton based on diffusive molecular CO2 uptake,
MEPS 133, 275-285.

13CO2=13DIC+23.644-(9701.5/Tkelvin)

Difference Bakker-Trull (umol/kg)/Average: -3.7
Difference Bakker-Trull (umol/kg)/SD: 5.24

Data Processing Description

Dataset Processing Description

See SOIREE Preliminary Voyage Report

BCO-DMO Processing Notes
Generated from original file SOIREE_Export_final.xls, Tab: 13C DIC
provided on the Deep-Sea Research II 48 (2001) accompanying CD-Rom

BCO-DMO Edits
- parameter names modified to conform to BCO-DMO convention
- date_UTC, time_UTC, lat, lon added from SOIREE_Stations_CTDSampling.xls
- Blank rows in original sheet removed
- 'nd' added to blank cells
- Made column header record one line
- Added 'T' to CTD cast for consistency with other spreadsheets
- Made Date, and Day and Patch Location 3 columns and added to each record
- Formatted Date (NZST) to YYYYMMDD
- Changed 'NaN' to 'nd'

More information about this dataset deployment

Instruments

CTD Sea-Bird 911

Supplied Name: CTD Seabird 911

Supplied Description:

NIWA's Seabird 911plus CTD and related instrumentation

Instrument Type

Generic Name: CTD Sea-Bird 911

Acronym: CTD SBE 911

Community Identifier: http://vocab.nerc.ac.uk/collection/L22/current/TOOL0035/

Generic Description:

The Sea-Bird SBE 911 is a type of CTD instrument package. The SBE 911 includes the SBE 9 Underwater Unit and the SBE 11 Deck Unit (for real-time readout using conductive wire) for deployment from a vessel. The combination of the SBE 9 and SBE 11 is called a SBE 911. The SBE 9 uses Sea-Bird's standard modular temperature and conductivity sensors (SBE 3 and SBE 4). The SBE 9 CTD can be configured with auxiliary sensors to measure other parameters including dissolved oxygen, pH, turbidity, fluorescence, light (PAR), light transmission, etc.). More information from Sea-Bird Electronics.

Sediment Trap

Supplied Description:

MULTI-trap dimensions:

Length (L, m): 0.58 Trap length with baffles inserted;

L without baffles: 0.525 m

AR without baffles: 7.50

Trap volume without baffles: 2.021 litres

Inside diameter (Di, m): 0.07

Outside diameter (Do, m): 0.08

Aspect ratio (AR): 8.29

Aspect ratio with salt (AR): 7.29 Basal brine added to a height of 1-trap diameter (7 cm)

Collection area (A, m2): 0.00385

Trap volume (V, m3): 0.00223

Trap volume (V, litres): 2.232

Baffle length (Lb, m): 0.08

Baffle diameter (Dib, m): 0.01

Baffle aspect ratio (ARb): 5.77

Instrument Type

Generic Name: Sediment Trap

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/33/

Generic Description:

Sediment traps are specially designed containers deployed in the water column for periods of time to collect particles from the water column falling toward the sea floor. In general a sediment trap has a jar at the bottom to collect the sample and a broad funnel-shaped opening at the top with baffles to keep out very large objects and help prevent the funnel from clogging. This designation is used when the specific type of sediment trap was not specified by the contributing investigator.

Parameters

Supplied Name	Supplied description	Supplied Units	Standard Name
Date_NZST	date NZST	YYYYMMDD	date_local
lon	longitude, negative denotes West	decimal degrees	lon
lat	latitude, negative denotes South	decimal degrees	lat
date_UTC	UTC Date	YYYYMMDD	date
time_UTC	UTC time	HHMM	time
depth	Sample depth	meters	depth
Sample_Bottle	Sample Bottle Number	integer	bottle
Day	SOIREE Experiment Day	Text	no_bcodmo_term
Patch	Patch Location (In/Out)	Text	no_bcodmo_term
CTD_cast	CTD Station/Cast Id	Text	no_bcodmo_term
sal	CTD Salinity (PSS-78)	dimensionless	sal
Temp_In_situ	In situ temperature	degrees celsius	no_bcodmo_term
DIC	DIC	umol/kg	DIC
C13_minus_DIC_vs_PDB	13C minus DIC vs PDB	(tbd)	no_bcodmo_term
C13_minus_CO2_Rau_etal_97	13C minus CO2 Rau etal 97	(tbd)	no_bcodmo_term
B_Depth	Bottle Depth (??)	meters	no_bcodmo_term
DIC_Bakker_and_Watson	Bakker and Watson DIC	umol/kg	no_bcodmo_term
Notes	Notes	text	no_bcodmo_term
DIC_Difference_Bakker_minus_Trull	DIC Difference Bakker minus Trull	umol/kg	no_bcodmo_term

Database

Contribute Data

Dataset: SedimentTraps - 13C DIC
Deployment: 61TG_3052

Dataset acquisition description

Dataset Processing Description

Database

Contribute Data

Dataset: SedimentTraps - 13C DICDeployment: 61TG_3052

Dataset acquisition description

Dataset Processing Description

Dataset: SedimentTraps - 13C DIC
Deployment: 61TG_3052